Re: [PATCH] btrfs: trimming some start_transaction() code away

[David Sterba]

On Thu, Aug 27, 2015 at 11:53:45PM +0000, Alexandru Moise wrote:
> Just call kmem_cache_zalloc() instead of calling kmem_cache_alloc().
> We're just initializing most fields to 0, false and NULL later on
> _anyway_, so to make the code mode readable and potentially gain
> a bit of performance (completely untested claim), we should fill our
> btrfs_trans_handle with zeros on allocation then just initialize
> those five remaining fields (not counting the list_heads) as normal.
> 
> Signed-off-by: Alexandru Moise <00moses.alexander00@xxxxxxxxx>

The performance gain is arguable but the generated code should be
smaller, which counts.

Reviewed-by: David Sterba <dsterba@xxxxxxxx>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/